Page 181 - CW E-Magazine (8-4-2025)

Special Report Special Report

synthesized by controlling the Pd load- High-effi ciency direct sured activity and chemical composi- catalyst partially dissolves under hydro-
ing amount and preparation methods, esterifi cation of CO and tion is reported. (Ind. Eng. Chem. Res., formylation conditions. Cyclohexene
2
on the title conversion of practical methanol over Co-doped CeO 2025; DOI: 10.1021/acs.iecr.5c00026). was used as an olefi n at 40 bar and
interest. The nanocluster catalyst gave catalysts 2 100°C. Heterogeneous separation was
relatively high hydrogenation activity. Enhanced stability and done. Long-chain C -C alkenes, alpha-
18
6
(Chem. Commun., 2025/DOI:10.1039/ C. Xue et al have worked on the title activity in upgrading ethanol methylstyrene and mixed octenes were
cent breakthrough and perspectives are monomers in up to 98%. Blends of D4CC05105J). reaction to make dimethyl carbonate (E) to n-butanol (B) using a studied. (Ind. Eng. Chem. Res., 2025;
discussed. (ChemSusChem, 2024; DOI: polymers can also be processed. (DMC; which is obtained via exchange Ru polyphenylene catalyst DOI: 10.1021/acs.iecr.4c03886).
10.1002/cssc.202402335). Ketonization of valeric acid to reaction of ethylene carbonate with
Inverting methanol 5-nonanone CH OH). The chemical stability of CO X. Pei et al have compared homo- Production of xylenes from
3
2
Catalyst improved dehydrogenation selectivity makes this reaction diffi cult. A series of geneous and heterogeneous catalysts in heavy reformate (HR)
stereoselectivity and by crowding atomic Ni species A.A. Eslami et al have screened metal catalysts M-CeO (M= Fe, Cu, Co, La, Guerbet chemistry. There is a reference
2
regioselectivity control to over α-MoC catalysts oxides for the title reaction. Good Zr, Ni, and Al) were constructed by a to catalyst compatible with molecular HR contains pseudocumene, ethyl tolue-
access completely alternating catalysts have both lattice energy and sieves for water removal, which results nes, mesitylene, etc. and T. Kella et al
poly(lactic acid-co-glycolic Y. Ge et al have referred to metal car- amphoteric properties. ZrO was found in enhanced B yields. In situ reduction have worked on converting this C9+
2
cut into xylenes. This review highlights
acid) (PLGA) with enhanced bides as promising alternatives of noble to be the most active catalyst. Tempera- of Ru polyphenylene catalyst was car- the role of zeolite catalysts in improv-
properties metal catalysts. However, the precise ture was in the range of 350-450°C. ried out to form Ru nanocluster during ing product selectivity and focuses on
Guerbet reaction. Detailed functioning
control of reaction pathways on them The catalysts were fully characterised
remains a formidable challenge. When and by products were also analysed. of the catalyst is reported. (Applied catalyst modifi cations and topologies.
X. Guo et al have referred to the α-MoC is decorated with crowding (ChemCatChem., 2024; DOI: 1002/ Catalysis A: General, 2025, 694, 25 The effects of incorporating various
title polymer as an ideal candidate atomic Ni species, CH OH goes to CO cctc.202401467). March, 120139; DOI:10.1016/j.apca- metals in zeolites on the product selec-
for controlled drug delivery. These + H . Under optimal conditions, ex- doping strategy. 2-Cyanopyridine (CP) ta.2025.120139). tivity and yield are reported. Aspects of
3
2
authors have used the chiral (BisSalen) cellent selectivities of the target com- Molecularly defi ned lubricant was employed as a dehydrating agent catalyst deactivation and regeneration
Al catalyst, which promoted a robust pound (over 90%) can be achieved in hydrocarbons from olefi n to facilitate the esterifi cation reaction. Glycerol (G) to AA are discussed. Aspects of reactor engi-
polymerisation of enantiopure 3-methyl both cases with unprecedented pro- Under optimal conditions 61% con- neering and process optimisation are
glycolide with highly glycolic site duction rates of methyl formate and metathesis version of CH OH with 61.6% yield of A. Kurniawan et al have investigated also covered. (Ind. Eng. Chem. Res.,
3
selectivity, giving alternating PLGA H for different versions of the catalyst. Z.J. Berkson et al have referred to DMC was realised. Monomethyl car- the gas phase conversion of G to AA 2025; DOI: 10.1021/acs.iecr.4c03940).
with regioselectivity. Degradation and Kinetic, spectroscopic and computa- the use of hydrocarbons based syn- bonate was an intermediate. (Ind. Eng. through consecutive dehydration and
2
drug release experiments were done. tional assessments were integrated to thetic lubricants. Branched terminal Chem. Res., 2025; DOI: 10.1021/acs. H transfer reactions over Mo-V oxides Transalkylation between
2
(Angew. Chem. Intl. Ed., 2024; DOI: clarify the mechanism of the above re- olefi ns were used and after metathesis iecr.4c04628). supported on acid-modifi ed montmo- C aromatics and
10
10.1002/anie.202417075). markable selectivity inversion. (Angew. were subjected to hydrogenation. An- rillonite (HMMT). The use of HMMT 2-methylnaphthalene
Solvent-free chemical Chem. Intl. Ed., 2024; DOI: 10.1002/ alytical procedures were employed In situ reduced Ni-Sn as a support enables the well dispersion (MN) to synthesize
of metal oxide particles with nominal
recycling of polyesters and anie.202023682). to characterize the products. (Chem- bimetallic catalyst for loadings up to 5 wt % on the catalyst 2,6-dimethylnaphthalene
polycarbonates by Mg-based CatChem., 2024; DOI: 10.1002/cctc. enhancing direct upgrading surface while the acidic sites facilitate (DMN) by Mo-modifi ed
Lewis acid catalyst From single atoms to 202401590). of aqueous ethanol to higher dehydration of G to acrolein with 74% HZSM-12 catalysts
nanoparticles: Size effect on
alcohols
W. Zhao et al have utilised commercially Pd/C-catalysed hydrogenation Carbonylation reactions using selectivity. At 320°C and ambient pres- DMN is a key raw material to make
available Lewis acids (LAs) to realize of 2,5-furandicarboxylic acid single-atom catalysts B. Chen et al have investigated NiSnH sure, 22% yield of AA is reported. (Ind. the corresponding dicarboxylic acid,
closed-loop recycling through the cata- L. Jurado et al have reviewed the re- catalysts under various gas atmospheres Eng. Chem. Res., 2025; DOI: 10.1021/ which in turn is used to make polyethy-
lytic depolymerisation of aliphatic J. Zheng et al have reported a study cent advances in tailoring solid sup- and pretreatment temperatures and this acs.iecr.4c02838). lene naphthalate (PEN), which has
polyesters and polycarbonates. Thus of fi ve catalysts with Pd particle sizes ports for single-atom catalysts (SACs) have infl uence on the title conversions. some outstanding properties compared
Theoretical insights are reported and A carrier-free recyclable
poly(ε-caprolactone) and poly(trimethy- ranging from single atoms to nano- to enhance their catalytic performance to PET. C. Xiong et al have made a
lene carbonate) were converted to clusters and nanoparticles, which were correlative dependence between mea- Rh/Terpyridine catalyst for series of Mo/HZSM-12 molecular sieve
in the title reaction, hydroformylation, alkene hydroformylation: catalysts for the title reaction. The trans-
methanol carbonylation, and oxidative Homogeneous catalysis and alkylation reaction was done under H
2
carbonylation. Optimizing of solid sup- heterogeneous separation atmosphere. 30% Mo/HZSM-12 gave
ports to realise highly active and selec- excellent performance with 61% con-
tive performance is discussed. In situ/ H. Fang et al have synthesized a new version of MN and 2,6- to 2,7-DMN
operando characterisation of the cata- square-planar geometry Rh (I) com- ratio of 1.69. (Applied Catalysis, 2025,
lyst is covered. (ChemCatChem., 2024; plex, Rh (CO) (Terpyridine) and pro- 693, 5 March, 120138; DOI:10.1016/j.
1
DOI: 10.1002/cctc.202400543). perly characterised the catalyst. This apcata.2025.120138).

180 Chemical Weekly April 8, 2025 Chemical Weekly April 8, 2025 181

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